What companies have gone above and beyond?

Mondial designs (now of Klipsch). Adam Gershon on email, Paul Rosenberg on the phone - offered and delivered free custom work on the output stage of my Act3 to better mate to my Klipsch La Scalas, and were patient and voluminous (and correct!) with help on questions on other units. Professional, courteous, and totally stand-behind-ish. They deserve highest marks.

Audio Research,Transparent Cable and Wisdom Audio

Two other outstanding gentlemen should be mentioned. Knut at conrad johnson has always been very helpful, prompt and honest in all matters. An outstanding company. Also deserving mention is Don Scott, former stereophile writer and tuner guru. He has been gracious and kind as I have searched out a good vintage tuner.

Paul

Jena Labs, Jennifer for all your Audio needs. Ive dealt with most of the above and Jennifer gets my vote PERIOD.
Steve

Atma-Sphere Music Systems, Ralph Karsten & Associates
Marigo Audio Lab, Ron Hedrich
Tri-Planar, Tri Mai
Zcable, Mark Hampton

Although my contact with David Elrod of Elrod Power Sytems has been limited, I suspect he is in the same league as those mentioned above in terms of exceptional customer service and passion for his craft.